Festa, Gaetano (2009) A Local Magnitude Scale for Southern Italy. [Pubblicazione in rivista scientifica]

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Tipologia del documento: Pubblicazione in rivista scientifica
Lingua: English
Titolo: A Local Magnitude Scale for Southern Italy
Festa, Gaetano[non definito]
Autore/i: A. Bobbio, M. Vassallo, G. Festa
Data: 2009
Numero di pagine: 10
Dipartimento: Scienze fisiche
Numero identificativo: 10.1785/0120080364
URL ufficiale: http://www.bssaonline.org/cgi/content/abstract/99/...
Data: 2009
Volume: 99
Numero: 4
Intervallo di pagine: pp. 2461-2479
Numero di pagine: 10
Parole chiave: Sismologia, reti sismiche, analisi dati
Numero identificativo: 10.1785/0120080364
Depositato il: 21 Ott 2010 06:57
Ultima modifica: 30 Apr 2014 19:43
URI: http://www.fedoa.unina.it/id/eprint/7533


local magnitude scale has been defined for southern Italy, in the area monitored by the recently installed Irpinia Seismic Network. Waveforms recorded from more than 100 events of small magnitude are processed to extract synthetic Wood–Anderson traces. Assuming a general description of peak-displacement scaling with the distance, by means of linear and logarithmic contributions, a global exploration of the parameter space is performed by a grid-search method with the aim of investigating the correlation between the two decay contributions and seeking for a physical solution of the problem. Assuming an L2 norm, we found M=logA+1.79 log R - 0.58 yielding an error on the single estimation smaller than 0.2, at least when the hypocenter location is accurate. Station corrections are investigated through the station residuals, referring to the average value of the magnitude. Using a z test, we found that some stations exhibit a correction term significantly different from 0. The use of the peak acceleration and peak velocity as indicators of the magnitude is also investigated.

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